github.com/Andyfoo/golang/x/net@v0.0.0-20190901054642-57c1bf301704/route/sys_openbsd.go (about)

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package route
     6  
     7  import "unsafe"
     8  
     9  func (typ RIBType) parseable() bool {
    10  	switch typ {
    11  	case sysNET_RT_STATS, sysNET_RT_TABLE:
    12  		return false
    13  	default:
    14  		return true
    15  	}
    16  }
    17  
    18  // RouteMetrics represents route metrics.
    19  type RouteMetrics struct {
    20  	PathMTU int // path maximum transmission unit
    21  }
    22  
    23  // SysType implements the SysType method of Sys interface.
    24  func (rmx *RouteMetrics) SysType() SysType { return SysMetrics }
    25  
    26  // Sys implements the Sys method of Message interface.
    27  func (m *RouteMessage) Sys() []Sys {
    28  	return []Sys{
    29  		&RouteMetrics{
    30  			PathMTU: int(nativeEndian.Uint32(m.raw[60:64])),
    31  		},
    32  	}
    33  }
    34  
    35  // InterfaceMetrics represents interface metrics.
    36  type InterfaceMetrics struct {
    37  	Type int // interface type
    38  	MTU  int // maximum transmission unit
    39  }
    40  
    41  // SysType implements the SysType method of Sys interface.
    42  func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }
    43  
    44  // Sys implements the Sys method of Message interface.
    45  func (m *InterfaceMessage) Sys() []Sys {
    46  	return []Sys{
    47  		&InterfaceMetrics{
    48  			Type: int(m.raw[24]),
    49  			MTU:  int(nativeEndian.Uint32(m.raw[28:32])),
    50  		},
    51  	}
    52  }
    53  
    54  func probeRoutingStack() (int, map[int]*wireFormat) {
    55  	var p uintptr
    56  	rtm := &wireFormat{extOff: -1, bodyOff: -1}
    57  	rtm.parse = rtm.parseRouteMessage
    58  	ifm := &wireFormat{extOff: -1, bodyOff: -1}
    59  	ifm.parse = ifm.parseInterfaceMessage
    60  	ifam := &wireFormat{extOff: -1, bodyOff: -1}
    61  	ifam.parse = ifam.parseInterfaceAddrMessage
    62  	ifanm := &wireFormat{extOff: -1, bodyOff: -1}
    63  	ifanm.parse = ifanm.parseInterfaceAnnounceMessage
    64  	return int(unsafe.Sizeof(p)), map[int]*wireFormat{
    65  		sysRTM_ADD:        rtm,
    66  		sysRTM_DELETE:     rtm,
    67  		sysRTM_CHANGE:     rtm,
    68  		sysRTM_GET:        rtm,
    69  		sysRTM_LOSING:     rtm,
    70  		sysRTM_REDIRECT:   rtm,
    71  		sysRTM_MISS:       rtm,
    72  		sysRTM_LOCK:       rtm,
    73  		sysRTM_RESOLVE:    rtm,
    74  		sysRTM_NEWADDR:    ifam,
    75  		sysRTM_DELADDR:    ifam,
    76  		sysRTM_IFINFO:     ifm,
    77  		sysRTM_IFANNOUNCE: ifanm,
    78  		sysRTM_DESYNC:     rtm,
    79  	}
    80  }